Malicious PDF — malware analysis report

Static analysis result for SHA-256 d60ab07f7792404a…

MALICIOUS

PDF

42.3 KB Created: 2020-08-19 14:17:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f2ec64772b8e47de51519fd8f3f3b635 SHA-1: 73049e797b969e9c338e4c40dfb1bf43eaf47c91 SHA-256: d60ab07f7792404a7696e6b7a02608e37bbf7607ed4049b3fa279803f9321455
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector infrastructure at `ttraff.com`. The document body, though heavily obfuscated, also contains this URL and references to other PDFs hosted on `cdn.shopify.com`, suggesting a link farm or redirection strategy. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it's designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=baba+black+sheep+nursery+rhymes
    • http://files.roanokeyoga.com/uploads/1/3/0/9/130969942/suxad.pdf
    • https://cdn.shopify.com/s/files/1/0432/7351/9269/files/vojazolejeleje.pdf
    • https://cdn.shopify.com/s/files/1/0435/9441/6290/files/61556531300.pdf
    • https://cdn.shopify.com/s/files/1/0431/6200/9755/files/list_of_important_days_in_2020.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/aquaponics_instructions.pdf
    • https://cdn.shopify.com/s/files/1/0435/0581/1608/files/punujanoked.pdf
    • https://cdn.shopify.com/s/files/1/0431/4664/1570/files/33553891810.pdf
    • https://cdn.shopify.com/s/files/1/0434/0042/9731/files/nagilewutalazovofikog.pdf
    • https://cdn.shopify.com/s/files/1/0429/9289/4115/files/tukafixemijerap.pdf
    • https://cdn.shopify.com/s/files/1/0431/1964/0738/files/83393082189.pdf
    • https://cdn.shopify.com/s/files/1/0431/4890/2554/files/lemifuxizanafagatanid.pdf
    • https://cdn.shopify.com/s/files/1/0433/2240/9125/files/49787281764.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006688.bin
02343c21d0dca225a68665ff80b8bc277de0dd26f7d1de5860d84a6b9a49af3f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6688 5528 bytes
font_01_sfnt_off0000791e.bin
f49ac8b3beaff022e425f867bb9131af959618d7621e9c4ea7e513c2fca0a7d3
pdf-font-stream PDF embedded font (sfnt) at offset 0x791E 10416 bytes